Spark-plug carrier and testing device



Dec. 30, 1924.v

H. L. ops/AHI.v

SPARK PLUG` CARRIER AND TESTING DEVICE vTo @ZZ whom t mag/concern:

SPARK-PLUG CARRIER LAND TESTING DEVICE.

" application flied January ai, 192i. semi no. 441,236.

Be it known. that l, HARRY UPSAHL, a citizen of thev United States, residing at Minneapolis, in the county of Hennepin and State of Minnesota, have invented certain new and useful Improvements in` Spark- Plug Carriers and Testing Devices; and I do hereby declare the followngto bea full,

clear, and exact description of theinvention,

such as will enable others skilled inthe art to which it appertains to make and use the same.

This invention relates to a spark plug carrier and testing device adapted to be secured to an internal combustion .engi-ne, preferably onthe top'of one of the engine cylinders. lt is an object of this invention to provide a device in which an extra spark plug can be disposed and in which it will be rmly retained.

It is also an object of the invention to have this extra spark plug carried in such position that it can be readily tested as toits condition and also form testing means for the ignition system.

These and other objects and advantages of the invention will become apparent from the following description made in connection with the accompanying drawingsv in which like reference characters refer to the same parts throughout the several views, and in which- Fig. l is a view showing a portion of the cylinder head of an engine in section upon which the plug carrying means is disposed, an operative plug also being shown;

Fig. 2 is a top plan view of the spark plug support;

Fig. 3 is a partial plan ,view of a modification thereof; and f Fig. 4 is a view in side elevation as seen from the bottom of Fig. 3.

Referring to the drawings, the top of an engine cylinder head is shown generally as 1 and the spark plug 2 is shown asscrewed in the usual spark plug opening and connected to the cable 3 which is connected with the ignition apparatus. The cable 3 is pro-- vvided with the usual metalcontact clip 4 6a adapted to be secured to the cylinder head,

by being placed under thehead of one of the cylinder head bolts. It will, of course,

be understood that separateattachingmean's may be provided forpthe bracket ifso desired. The bracket extends upwardly and laterally from the base portion 6@ and is prof. vided at its upper portion with an enlarged f circular head having opening 7 formed therethrough and a depending ange 8 surrounding said opening. The bracket 6 isr de*- signed toy be made `of brass or other soft TET f OFFICE jl N` j metal somewhat softer than the body ,of the y sparkl plugs. The opening 7 taperedor converges downwardly and an extra spark plug a is adaptedto be vcarried therein. The

plug a will vbe pressed or jammed down'into the opening 7 `and given a slight turn when the threads thereon will grip with lthe sides of the tapered opening 7 and the plug willV thus beheld firmly in position.` The threaded end ofa spark plug is ordinarily tapered so that by giving the plug a slight turn avery firm engagement of the threads with th `bracket 6 will be obtained.

In the modication shown in Fig. 3, the opening 7 is provided with downwardly and inwardly extended projections 9. The plug will be inserted in the opening 7 in the same manner as described for the yopening 7.

The tongues 9 will be somewhat resilient .and the threads of the spark plug, in addition to gripping the same by turning, will engage slightly over the ends of the same .and

`will thus be firmly held against withdrawal. The same can, however, be quickly removed by a turning movement. c

With the extra spark plug disposed, as

shown, on the bracket, the same will be inl convenient position to be withdrawn and be inserted in one of the cylinders if the driver of the car should have trouble with the spark plugs in operation. By loosening the cable 3 the contact piece 4 from the binding post on one of the spark plugs in the cylinders andattaching the same `to the. eXtra spark plug, the extra plug can be readily tested, as

shown in Fig. l, since it will be grounded to c the engine frame by means of the bracket.

The operation of the ignition can be alsotested and ascertained by this manner and the strength of the sparkseen by-runnin'g the engine at different speeds.y The bracket therefore, forms a very convenient means forcarrying anvextra plug, and, as stated, isy

in the most Vconvenient position for use in testing. y

It will thus be seen that applicant'has provided an extremely simple` and very useful appliance for an automobile engine and one which has great utility. The eXtra plug will be firmly carried in the described bracket and will not rattletherein or be jolted out of engagement therewith.

It will, of course, be understood that various changes may be made in the form and proportions of the device without departing from the scope of applicant-s invention, which, generally stated7 consists in the matter shown and described and set forth in the appended claims. i What is claimed is:

i l. A spark plug carrier for an inter-nai combustion engine comprising a thin strip of comparatively soft metal having one of its ends apertured and adapted to be clamped under one of the nuts ona cylinder head bolt, said strip having its other end offset to be disposed above said first mentioned end and having an aperture therein and provided with integral portions spaced about said aperture .and projecting therefrom adapted to receiveand hold the threaded end of a spark plug thrust and turned therein.

2. A spark plugy carrier for an internal combustion engine comprising a thin strip of comparatively soft metal having one of its ends apertured and adapted to be clamped under one of the nuts: on a cylinder head bolt7 said strip=havi11g its other end oset to be disposed adjacent said first mentioned endfand having an aperture therein, spaced integral tangs surrounding said aperture and projecting away from the plane of said latter end, said tangs being adapted to receive and hold a spa-rk plug thrust and turned therein.

lfn testimony whereol I aHiX my signature.

HARRY L. OPSAHL. 

